save blob using xmlhttprequest asp.net C#

See more:

C#

ASP.NET

I have record a Audio wav file using html5 and storing it using XMLHttpRequest code is like below

var xhr = new XMLHttpRequest();
xhr.open('POST', '/upload.aspx', true);
xhr.onload = function (e) {
var result = e.target.result;
};
xhr.send(blob);
And on upload.aspx has below code

String AudioFileName = "Audio_" + DateTime.Now.ToString("yyyyMMdd_hhss") + ".wav";
Request.SaveAs((Server.MapPath(".") + "/Audio/" + AudioFileName), false);
Session["AudioFileName"] = Convert.ToString(AudioFileName);

In my local I have its working but with the same code on server the Audio size is 0KB or 1 KB.